/*
 * Copyright 2017 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.microbench.handler.ssl;

import io.netty.util.internal.ThreadLocalRandom;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.TearDown;

import javax.net.ssl.SSLEngineResult;
import javax.net.ssl.SSLException;
import java.nio.ByteBuffer;

public abstract class AbstractSslEngineThroughputBenchmark
        extends AbstractSslEngineBenchmark
{

    @Param(
    { "64", "128", "512", "1024", "4096" })
    public int messageSize;

    protected ByteBuffer wrapSrcBuffer;

    private ByteBuffer wrapDstBuffer;

    @Setup(Level.Iteration)
    public final void setup() throws Exception
    {
        initEngines();
        initHandshakeBuffers();

        wrapDstBuffer = allocateBuffer(
                clientEngine.getSession().getPacketBufferSize());
        wrapSrcBuffer = allocateBuffer(messageSize);

        byte[] bytes = new byte[messageSize];
        ThreadLocalRandom.current().nextBytes(bytes);
        wrapSrcBuffer.put(bytes);
        wrapSrcBuffer.flip();

        // Complete the initial TLS handshake.
        if (!doHandshake())
        {
            throw new IllegalStateException();
        }
        doSetup();
    }

    protected void doSetup() throws Exception
    {
    }

    @TearDown(Level.Iteration)
    public final void tearDown() throws Exception
    {
        destroyEngines();
        destroyHandshakeBuffers();
        freeBuffer(wrapSrcBuffer);
        freeBuffer(wrapDstBuffer);
        doTearDown();
    }

    protected void doTearDown() throws Exception
    {
    }

    protected final ByteBuffer doWrap() throws SSLException
    {
        wrapSrcBuffer.position(0).limit(messageSize);

        wrapDstBuffer.clear();

        SSLEngineResult wrapResult = clientEngine.wrap(wrapSrcBuffer,
                wrapDstBuffer);

        assert checkSslEngineResult(wrapResult, wrapSrcBuffer, wrapDstBuffer);
        return wrapDstBuffer;
    }
}
